Calculating Furnace Size?

Answer

The best way to calculate a furnace size is to ask a contractor. They are trained in things like this and can ensure your sizing is done properly. The scientific method used is called The manual J load calculation.
1 Additional Answer
There are many ways to calculate the right furnace size for your house, and it is important that you do so. The most accepted method is the Manual J Load calculation that factors in construction material, insulation levels, windows, and sizes of rooms among other things. The software to do this calculation is available for purchase. If you are replacing an existing furnace you can simply replace it with a model that has the same output BTU.
Q&A Related to "Calculating Furnace Size?"
1. Use a furnace calculator, such as HVAC Equipment Size Finder, Home Heat Loss Calculator or the Energy Star Furnace Calculator, to determine the amount of BTUs needed for your home
http://www.ehow.com/how_8649560_calculate-furnace-...
To size a furnace for a house you need to figure out the square footage of your home. Then you need to do research and check the output of the different furnaces.
http://answers.ask.com/Business/Other/how_to_size_...
Understand how furnaces are sized.
http://www.ask.com/question/how-is-the-proper-resp...
1. Check a list of recorded values to find the insulation's resistivity. For example, if the cable uses Teflon insulation, note that it has a resistivity of 1 × 10^19 ohm-meters
http://www.ehow.com/how_12060178_calculate-insulat...
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The best way to calculate a furnace size is to ask a contractor. They are trained in things like this and can ensure your sizing is done properly. The scientific ...
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